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Gas Permeation Properties of Sulfonated 6FDA-based Polyimide Membranes  

Rhim, Ji-Won (College of Life Science & Nano Technology, Department of Chemical Engineering & Nano-Bio Technology, Hannam University)
Yoon, Seok-Won (Korea Electric Power Research Institute, Green Growth Laboratory)
Lee, Byung-Seong (College of Life Science & Nano Technology, Department of Chemical Engineering & Nano-Bio Technology, Hannam University)
Lee, Bo-Sung (College of Life Science & Nano Technology, Department of Chemical Engineering & Nano-Bio Technology, Hannam University)
Cheong, Seong-Ihl (College of Life Science & Nano Technology, Department of Chemical Engineering & Nano-Bio Technology, Hannam University)
Publication Information
Membrane Journal / v.19, no.3, 2009 , pp. 237-243 More about this Journal
Abstract
Polyimides synthesized by using 2,2'-bis(3,4-carboxylphenyl) hexafluoropropane dianhydride (6FDA) and 4,4'-diaminodiphenylmethane (DAM) were sulfonated according to reaction times, 5 min to 20 min. And the resulting polyimide membranes were investigated in terms of permeability and separation factor for $N_2$, $O_2$, and $CO_2$ gases. The introduction of bulky group, $-{SO_3}H$, leads to the decreases of both diffusivities and solubilities for all the range of reaction times. At 20 min of sulfonation, the diffusivity and solubility of $N_2$ decrease up to 21% and 26%, respectively. Overall separation efficiencies for $O_2/N_2$ and $CO_2/N_2$ increase as the reaction time increases to 20 min.
Keywords
gas separation; sulfonation; 6FDA-DAM; polyimide;
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Times Cited By KSCI : 1  (Citation Analysis)
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